GB 13476-2009[GB/T 13476-2009] Pretensioned spun concrete piles [including 2014 MODIFICATION 1] (English PDF)

5373.2004 "Precast Prestressed Concrete Products" is non-equivalent.

This Standard replaces GB 13476-1999 "Pretensioned Spun Concrete Piles".

Compared with GB 13476-1999, main differences of this Standard are as follows.

— Revise the representation method of normative references (chapter 2 in edition

1999; chapter 2 in this Standard);

— Revise the product classification (chapter 3 in edition 1999; chapter 3 in this

Standard);

— Revise raw materials and general requirements (chapter 4 in edition 1999; chapter 4

in this Standard);

— Revise technical requirements (chapter 5 in edition 1999; chapter 5 in this

Standard);

— Revise test method (chapter 6 in edition 1999; chapter 6 in this Standard);

— Revise inspection rules (chapter 7 in edition 1999; chapter 7 in this Standard);

— Revise marks (chapter 8 in edition 1999; chapter 8 in this Standard);

— Revise storage and transport (chapter 9 in edition 1999; chapter 9 in this Standard);

— Adjust the product certificate (chapter 10 in this Standard);

— Delete the provisions on product classification.

— Add pile specifications and minimum reinforcement area of prestressed steel (Table

3.1 Product class and code

Piles are divided into prestressed concrete piles and prestressed high-strength concrete

piles. The code of prestressed concrete pile is PC; the code of prestressed high-strength

concrete piles is PHC.

3.2 Product specifications and models

3.2.1 According to the outer diameters of piles, it is divided into 300 mm, (350 mm), 400

mm, (450 mm), 500 mm, (550 mm), 600 mm, 700 mm, 800 mm, 1 000 mm, 1 200 mm, 1

3.2.2 Piles are divided into type A, type AB, type B and type C according to effective

prestressed value.

3.3 Structural dimensions

3.3.1 Structural shapes and basic dimensions of piles shall conform to the provisions in

Figure 1 and Table 1.

3.3.2 Length of pile shall include pile body and joints.

t — Wall thickness;

L — Length;

D — Outer diameter.

Prestressed high-strength concrete piles of type A that have an outer diameter of 500 mm,

wall thickness of 100 mm and length of 12 m are marked as follows.

PHC 500 A 100-12 GB 13476

4.1 Raw materials

4.1.1 Cement

Use Portland cement, ordinary Portland cement and Portland slag cement of which the

strength is not lower than 42.5; the quality shall conform to the provisions of GB 175.

4.1.2 Aggregates

4.1.2.1 Fine aggregates should adopt clean-natural hard medium-coarse sand or artificial

sand; fineness modulus is preferably 2.5~3.2.When artificial sand is used, fineness

modulus may be 2.5~3.5; the quality shall conform to relevant provisions in GB/T 14684;

silt content of sand is not greater than 1%; chlorine ion content is not greater than 0.01%;

sulfide and sulfate content is not greater than 0.5%.

4.1.2.2 Coarse aggregates should adopt gravels or crushed pebbles; the maximum

particle size shall not exceed 25 mm and may not exceed 3/4 of clear distance of bars;

quality shall conform to relevant provisions of GB/T 14685; silt content of stone is not

greater than 0.5%; sulfide and sulfate content does not exceed 0.5%.

4.1.2.3 For piles that have anti-freeze, impermeability or other special requirements, the

aggregates used shall conform to relevant provisions of corresponding standards.

4.1.3 Steel

4.1.3.1 Prestressed steel shall adopt steel bar for concrete. The quality shall conform to

the provisions on low relaxation spiral channel steel bar in GB/T 5223.3; tensile strength is

not less than 1 420 MPa; non-proportional extension strength is not less than 1 280 MPa;

elongation after fracture shall not be greater than the stipulation on ductility grade 35 in

Table 3 of GB/T 5223.3-2005.

4.1.3.2 Spiral ribs should adopt low-carbon steel hot-rolled wire rods; concrete products

adopts cold drawn low-carbon steel wire; the quality shall respectively conform to the

relevant provisions in GB/T 701JC/T 540.

4.1.3.3 Generally piles have no end anchor bars. When end-anchor bar is required,

anchor bars should adopt low-carbon steel hot-rolled wire...

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